Teleportation via thermally entangled state of a three-qubit Heisenberg XX ring

摘要

We consider quantum teleportation using the thermally entangled state of athree-qubit Heisenberg XX ring as a resource. Our investigation revealsinteresting aspects of quantum entanglement not reflected by the pairwisethermal concurrence of the state. In particular, two mixtures of differentpairs of W states, which result in the same concurrence, could yield verydifferrent average teleportation fidelities.